1. Biological Molecules

• 1.1 Biological Molecules: Carbohydrates
• 1.2 Biological Molecules: Lipids
• 1.3 Biological Molecules: Proteins
• 1.4 Proteins: Enzymes
• 1.5 Nucleic Acids: Structure & DNA Replication
• 1.6 ATP, Water & Inorganic Ions

2. Cell Structure

• 2.1 Cell Structure
• 2.2 The Microscope in Cell Studies
• 2.3 Cell Division in Eukaryotic & Prokaryotic Cells
• 2.4 Cell Membranes & Transport
• 2.5 Cell Recognition & the Immune System
• 2.6 Vaccines, Disease & Monoclonal Antibodies

3. Exchange & Transport

• 3.1 Adaptations for Gas Exchange
• 3.2 Human Gas Exchange
• 3.3 Digestion & Absorption
• 3.4 Mass Transport in Animals
• 3.5 The Circulatory System in Animals
• 3.6 Mass Transport in Plants

4. Genetics, Variation & Interdependence

• 4.1 DNA, Genes & Chromosomes
• 4.2 DNA & Protein Synthesis
• 4.3 Genetic Diversity: Mutations & Meiosis
• 4.4 Genetic Diversity & Adaptation
• 4.5 Species & Taxonomy
• 4.6 Biodiversity

5. Energy Transfers In & Between Organisms (A Level only)

• 5.1 Photosynthesis (A Level only)
• 5.2 Respiration (A Level only)
• 5.3 Energy & Ecosystems (A Level only)
• 5.4 Nutrient Cycles (A Level only)

6. Organisms Respond to Changes in their Environments (A Level only)

• 6.1 Response to Stimuli (A Level only)
• 6.2 Nervous Coordination (A Level only)
• 6.3 Skeletal Muscles (A Level only)
• 6.4 Homeostasis (A Level only)

7. Genetics, Populations, Evolution & Ecosystems (A Level only)

• 7.1 Inheritance (A Level only)
• 7.2 Populations (A Level only)
• 7.3 Evolution (A Level only)
• 7.4 Populations in Ecosystems (A Level only)

8. The Control of Gene Expression (A Level only)

• 8.1 Genetic Mutations (A Level only)
• 8.2 Regulation of Gene Expression (A Level only)
• 8.3 Using Genome Projects (A Level only)
• 8.4 Gene Technologies (A Level only)